Bug 80819
| Summary: | Kernel is not handling multiple tasks correctly (not sure its a task problem) | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Thiago Sayao <sayao> |
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2004-09-30 15:40:21 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Check to see if your cdrom is using DMA with hdparm -d device RedHat has made it policy to disable DMA on cdrom drives for compatiability reasons. Which has the effect of greatly slowing it down for everyone else. [root@zeus sayao]# /sbin/hdparm -d /dev/cdrom /dev/cdrom: using_dma = 1 (on) Its enabled. During the boot kernel shows this message: /dev/hda DMA Disabled my cd-rom is /dev/hda The only way that I have found to reliably switch CD-ROM drives to DMA Mode is to: su to root cd /etc/sysconfig cp harddisks harddiskhda (or harddiskhdb or whatever your CD-ROM is.) edit the newly created harddiskhda with a text editor and change the USE_DMA=0 to USE_DMA=1. save the file and restart the machine. Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/ |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021218 Description of problem: When i copy files from a cd-rom for example all the system gets slow (maybe an ext3 problem ?). I ran the command top (several times) to see the cpu utilization and the maximum was 20%. I copied the files with both nautilus and the command cp and both gives me the same result, everything gets slow. By slow i mean *very* slow. My hardware: Athlon 1.2Ghz 256mb ram 52x creative cd-rom Hd maxtor 40gb ata 133 (my board is ATA 100) Asus A7A133. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Copy files from a not-so-fast media to the root partition. 2. The system will be ***VERY*** slow during the copy. Additional info: